During a study a bottlenose dolphin was blindfolded and instructed to mimic the actions of a trainer. When he wasn’t able to use sight, the dolphin switched to another technique: emit sounds, listen to the echo and interpret the resulting sound waves. Read more …

The deaths of over 100 melon-headed whales, which stranded on the shores of a lagoon in northwest Madagascar in 2008, were likely primarily triggered by a form of sonar being deployed by an ExxonMobil survey vessel, according to a scientific review panel.